| Harpenden to Chantilly (Virginia) | 3,666.25 mi (5,900.25 km) |
| Harpenden to Chaparral (New Mexico) | 5,127.24 mi (8,251.50 km) |
| Harpenden to Chapel Hill (North Carolina) | 3,868.16 mi (6,225.21 km) |
| Harpenden to Charleston (Illinois) | 4,063.18 mi (6,539.06 km) |
| Harpenden to Charleston (South Carolina) | 4,055.23 mi (6,526.26 km) |
| Harpenden to Charleston (West Virginia) | 3,859.65 mi (6,211.51 km) |
| Harpenden to Charlotte (North Carolina) | 3,975.44 mi (6,397.86 km) |
| Harpenden to Charlottesville (Virginia) | 3,747.27 mi (6,030.65 km) |
| Harpenden to Chaska (Minnesota) | 4,011.13 mi (6,455.29 km) |
| Harpenden to Chatham (Illinois) | 4,112.19 mi (6,617.93 km) |
| Harpenden to Chattanooga (Tennessee) | 4,161.06 mi (6,696.58 km) |
| Harpenden to Cheat Lake (West Virginia) | 3,727.85 mi (5,999.40 km) |
| Harpenden to Chelsea (Alabama) | 4,302.06 mi (6,923.49 km) |
| Harpenden to Chelsea (Massachusetts) | 3,252.64 mi (5,234.62 km) |
| Harpenden to Cheney (Washington) | 4,639.54 mi (7,466.63 km) |
